Make Slide/AnimationTrack dynamically managable

auto slide = presentation.newObject<Q3DSSlide>("slideN");
masterSlide->appendChildNode(slide);
// associate objects with slides
slide1->addObject(wonderfulCarModel);
slide1->addObject(wonderfulCarSubMesh1Material);
...
// specify property changes that are to be applied when entering the slide
slide1->addPropertyChanges(wonderfulCarModel, new Q3DSPropertyChangeList {
    Q3DSPropertyChange::fromVariant(QLatin1String("rotation"), QVector3D(0, 180, 0))
});
// manage animation tracks
Q3DSAnimationTrack anim(Q3DSAnimationTrack::Linear, model1, QLatin1String("rotation.z"));
anim.setKeyFrames({ { 0, 0 }, { 10, 360 } }); // z rotation is 0 at 0 s, 360 at 10 s
slide2->addAnimation(anim);

    id = slide1->addSlideObjectChangeObserver([...](Q3DSSlide *slide, const Q3DSSlide::SlideObjectChange &change) { ... });